The answer your'e looking for is C. informal, hope this helped!
The reason why they both have similar moods is because they're both about having control over your own fate and life, and just getting through life.However they both have different endings because "We Real Cool" is about being rebellious and having fun and getting into mischief, and at the end it says: "We Sing sin.We Thin gin.We Jazz June.We Die soon.".While "Invictus" is about no matter what the speaker goes through he will never give in and surrender, which it says at the end of the poem:"I'am the master of my fate; I'am the captain of my soul."
Answer:
I think the answer is A because it's giving a warning.
